Checking the form field values before submitting that page

Question

I have written following function which checks whether start date field is not empty and displays proper message when submit button is clicked  But then it takes the control to the previous page  So user has to write again all other fields on that form  Is there any way to stay on that page even after prompting the error message  with all other fields value     JavaScript function checkform         if document frmMr start date value                  alert  please enter start date            return false        else           document frmMr submit                HTML  lt html gt       lt form name frmMr action  page1 jsp  gt          Enter Start date           lt input type  text  size  15  name  start date  id  start date  gt           lt input type  submit  name  continue  value  submit  onClick  checkform     gt       lt  form gt   lt  html gt    Thanks in advance

User · Answer

You can simply make the start date required using    lt input type  submit  value  Submit  required   gt    You don t even need the checkform   then   Thanks

User · Answer

While you have a return value in checkform  it isn t being used anywhere - try using onclick  return checkform    instead    You may want to considering replacing this method with onsubmit  return checkform    in the form tag instead  though both will work for clicking the button

User · Answer

Don t know for sure  but it sounds like it is still submitting  I quick solution would be to change your  guessing at your code here     lt input type  submit  value  Submit  onclick  checkform    gt    to a button    lt input type  button  value  Submit  onclick  checkform    gt    That way your form still gets submitted  from the else part of your checkform    and it shouldn t be reloading the page   There are other  perhaps better  ways of handling it but this works in the mean time

User · Answer

use return before calling the function  while you click the submit button  two events form posting as you used submit button and function call for onclick  will happen  to prevent form posting you have to return false  you have did it  also you have to specify the return i e  to expect a value from the function    this is a code   input type  submit  name  continue  value  submit  onClick    return   checkform

[javascript] Checking the form field values before submitting that page

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